SOLUTION: Quadratic Formula , A room is one yard longer than it is wide. At 75c per sq. yd. a covering for the floor costs S31.50. Find the dimensions of the floor.

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Question 1069775: Quadratic Formula , A room is one yard longer than it is wide. At 75c per sq. yd. a covering for
the floor costs S31.50. Find the dimensions of the floor.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
L=W%2B1
A=LW=W%28W%2B1%29
C=0.75A=0.75W%28W%2B1%29=31.5
Divide both side by 0.75,
W%28W%2B1%29=42
W%5E2%2BW-42=0
%28W-6%29%28W%2B7%29=0
Only positive solution make sense here,
W-6=0
W=6yd
So,
L=6%2B1
L=7yd